A Directional, Low-Profile Zero-Phase-Shift-Line (ZPSL) Loop Antenna for UHF Near-Field RFID Applications
|
|
- Roxanne Underwood
- 5 years ago
- Views:
Transcription
1 A Directional, Low-Profile Zero-Phase-Shift-Line (ZPSL) Loop Antenna for UHF Near-Field RFID Applications YunjiaZeng (1), Xianming Qing (1), Zhi Ning Chen (2) (1) Institute for Infocomm Research, Singapore (2) National University of Singapore, Singapore Abstract- A low-profile zero-phase-shift-line (ZPSL) loop antenna is proposed to achieve a directional magnetic near-field distribution for applications in ultra-high frequency (UHF) near-field radio-frequency identification (RFID). The proposed antenna consists of three coaxially-stacked components, including a driven ZPSL loop, a parasitic ZPSL loop, and a metallic plate reflector. Conventional directional antennas that involve metallic plate reflectors require an optimal separation of one-quarter of a wavelength at the operating frequency between the antenna and the plate. Decreasing the separation would result in poor impedance matching as well as a reduction in gain for far-field antennas. To realize a low-profile directional far-field antenna, a novel approach was recently proposed by adding a parasitic strip between a dipole antenna and a metallic plate reflector, such that the phase of the reflected wave can be properly controlled. In this manner, the separation between the antenna and the reflector is reduced to 0.05 of the operating wavelength, while keeping the reflected and the directly radiated fields in phase in the desired direction. In this paper, such an approach is extended to the design of near-field antenna. Because of the geometry of the bi-directional ZSPL loop, the parasitic element is chosen as an aperiodic ZPSL loop that has the same geometry as the driven element to ensure a strong coupling between the two loops. In the design of near-field antennas, the current distributions of the antennas are the decisive factors affecting the near-field distributions. Therefore, the proposed antenna is designed based on the current distributions instead of the phase information as in the case of far-field antennas. The proposed antenna is fabricated and measured, and it proves to be an effective reader antenna for UHF nearfield RFID applications. 1. INTRODUCTION A ZPSL loop antenna consisting of single-line structures produces a bi-directional magnetic field distribution in the near-field zone of the antenna [1]. However, a directional field distribution is more desirable for certain applications such as an RFID smart shelf [2]. The conventional approach to realizing a directional field distribution involves applying a large metal plate as a reflector of an antenna, in which the reflector cannot be placed very close to the antenna to avoid a significant reduction of the magnetic field intensity in the desired region. This is because the eddy current induced on the reflector is in the opposite direction to that on the antenna, and decreasing the separation between the antenna and the reflector would result in field cancellation as well as poor impedance matching. In [3], the distance between a near-field ZPSL loop antenna and a metal plate reflector was set as λ 0 /8 (with λ 0 being the free-space wavelength at the operating frequency), which would significantly increase the thickness of the antenna, in particular, at lower frequency bands. One effective approach is to use an AMC reflector to replace the metal plate, such that the distance between the antenna and the reflector can be reduced and the magnetic field intensity can be further enhanced [4]. Nevertheless, it is nontrivial to design an AMC reflector and to integrate the reflector with a ZPSL loop antenna. Moreover, the fabrication cost increases when complex structures are employed in an AMC reflector. Conventional directional far-field antenna designs that involve metal plate reflectors require a λ 0 /4 separation between the radiator and the reflector, which increases the thickness of the antenna significantly. A reduced separation is able to make the antenna low profile while leading to poor impedance matching and degradation in radiation efficiency, due to the out-of-phase current induced on the reflector. A simplified approach of designing a directional low-profile far-field antenna has recently been proposed, wherein a parasitic strip was added in between a dipole antenna and a metallic ground plane [5]. The parasitic strip introduces an additional phase shift to compensate for the effects of the out-of-phase current on the ground.
2 With this, the dipole antenna can be positioned very close to the metallic ground plane and the separation between the antenna and the ground can be significantly reduced to λ 0 /20. In this paper, the approach of applying a parasitic strip in between a dipole and a ground is extended to the case of ZSPL loops. A low-profile ZPSL loop antenna is proposed to achieve a directional magnetic field distribution for UHF near-field RFID applications. The antenna has a low profile of of the operating wavelength at 915 MHz, achieving a desired directional magnetic field distribution over a circular interrogation zone with a perimeter of 1.5 times the operating wavelength. The proposed design is tested as a UHF near-field RFID reader antenna, and achieves much enhanced performance than a single ZPSL loop. 2. ANTENNA DESIGN The proposed antenna design is shown in Figure 1. The antenna consists of a driven ZPSL loop, a parasitic ZPSL loop, and a metallic ground plane. The driven and parasitic loops are printed on two pieces of singlelayer FR4 substrates (ε r = 4.3 and tan δ = 0.025, thickness of 32 mils, or mm), respectively. Figure 1(a) exhibits the driven element, which is an aperiodic ZPSL loop antenna with nonuniformly arranged unit cells that are shown in Figure 1(b). The length of the unit cell, L, varies from 52 to 80 mm (L 1 = 80 mm, L 2 = 64 mm, and L 3 = 52 mm). The radius R of the driven ZPSL loop is 80 mm. As suggested in [6], the aperiodic ZPSL loop antenna is able to generate a more uniform current flowing along the loop, which results in a more uniform magnetic field distribution with an enhanced magnetic field intensity. In Figure 1(c), the parasitic ZPSL loop is a closed aperiodic ZPSL loop with the same configuration as the driven one. Figure 1(d) presents the cross-section view of the design. The two ZPSL loop elements and the ground plane are coaxially stacked in the z-direction, with the driven element placed 5 mm above the parasitic element, which is positioned 10 mm above the ground. Figure1: Configurations of the proposed antenna design: (a) driven ZPSL loop; (b) ZPSL unit cell structure; (c) parasitic ZPSL loop; and (d) cross-section view of the antenna. (unit: mm). Unlike in [5], the phase information in the far-field approximation cannot be applied to design the nearfield antenna. The proposed antenna is designed based on the current distributions on the elements of the antenna, among which the effect of the parasitic ZPSL loop is significant. Considering a single loop with an in-phase current flow, the current induced on a nearby ground plane is in the opposite direction to that of the single loop. Since the out-of-phase currents are positioned closely, they cancel each other out and lead to reduced magnetic field intensity and non-uniform magnetic field distribution. In order to compensate for the effects of such a current cancellation, it is intuitive to assume that the parasitic ZPSL loop needs to carry a current of the same phase as that of the single loop. In Figure 2, the simulated current distribution of each part of the proposed antenna is shown. It can be observed that the driven and parasitic elements carry almost the same current. Figure 2(c) presents the current distribution on the ground plane, and the plotted region has the same size as the ZPSL loops. Several closed-loop currents are observed on the ground plane, with each of the currents flowing in the opposite direction to those on the ZPSL loops.
3 Figure 2: Simulated current distributions of the proposed antenna: (a) driven element; (b) parasitic element; and (c) ground plane. In order to verify the assumption on current distributions, the simulated magnetic field distribution along the z-axis of the proposed antenna design is examined in Figure 3. Compared with the distribution of the single driven ZPSL loop, the proposed antenna exhibits a directional magnetic field distribution, with the magnetic field in the negative z direction decreased by over 10 db. Another structure considered is the single driven ZPSL loop backed with a ground plane, which is constructed similar to the proposed antenna but with the parasitic ZPSL loop removed. It can be observed that the proposed design exhibits an enhanced magnetic field intensity compared to the case of a single ZPSL loop with a ground plane. When z increases above 20 mm, the magnetic field intensity of the proposed design becomes greater than that of the single ZPSL loop. The observation validates the assumption about the current distribution of the parasitic ZPSL loop. Figure 3: Simulated magnetic field distributions of the proposed antenna, the single ZPSL loop, and the single ZPSL loop with ground. Figure 4 presents the impedance characteristic of the proposed antenna. Three antennas are examined, including the proposed antenna, the single driven ZPSL loop, and the single ZPSL loop backed with a ground plane. In Figure 4(b), it is interesting to note that the proposed antenna shows a much higher input resistance than that of the single ZPSL loop, while the case without a parasitic ZPSL loop exhibits the lowest input resistance. It suggests that the in-phase current that flows along the parasitic ZPSL loop in the proposed design helps alleviate the current cancellation effects caused by the ground plane.
4 Figure 4: Simulated input impedance of the proposed antenna: (a) reactance; and (b) resistance. 3. ANTENNA IMPLEMENTATION AND MEASUREMENT Based on the parameters given in Section 2, the proposed antenna is fabricated and measured. Figure 5 compares the simulated and measured reflection coefficients of the antenna. The proposed antenna achieves -10 db reflection coefficient in the frequency band ranging from 902 to 931MHz. Figure 5: Simulated and measured reflection coefficients of the proposed antenna.
5 Figure 6(a) shows the measurement set-up of magnetic field distribution of the antenna. The self-built near-field scanning system includes a three-dimensional scanner, a vector network analyzer, and a near-field probe such as the Langer EMV-Technik RF-R 3-2 probe. The magnetic field distributions in three planes that are parallel to and above the measured antenna are obtained by scanning the probe with an interval of 5 mm. Figure 6(b) presents the set-up of the UHF RFID tag-reading test, wherein the antenna serves as the reader antenna. An Impinj Speedway UHF reader with an output power of 30 dbm is used to read 50 pieces of SAG round tags. Figure 6: (a) Magnetic field distribution measurement set-up and (b) UHF RFID tag-reading rate test. Figure 7 displays the magnetic field distributions ( H z ) at 915 MHz of the antennas measured under the same conditions. The magnetic field distributions are measured in the planes of z = 40, 80, and 120 mm, with z = 0 mm aligning with the top surfaces of the antennas. In all three planes, the proposed antenna exhibits an enhanced magnetic field distribution compared with that of the single ZPSL loop. Figure 8 shows a good agreement between the simulated and measured magnetic field distributions of the proposed antenna. The simulated results are normalized to the maximum values of the corresponding measured twodimensional distributions. Figure 7: Measured magnetic field distributions at 915 MHz. Single ZPSL loop: (a) z= 40 mm; (b) z= 80 mm; and (c) z = 120 mm. Proposed antenna: (d) z= 40 mm; (e) z= 80 mm; and (f) z = 120 mm.
6 Figure 8: Simulated and measured magnetic field distributions of the proposed antenna along the x- and y-axes in the plane of z = 40 mm at f = 915 MHz. Figure 9 compares the tag-reading rates of the proposed antenna and the single ZPSL loop, again measured under the same conditions with the same input power of 30 dbm. The configuration of a SAG tag is shown in the inset of Figure 9. The proposed antenna achieves 100% tag detection up to a reading distance of 110 mm. The proposed antenna proves to be an effective reader antenna with much enhanced performance for UHF near-field RFID applications. Figure 9: Measured tag-reading rate against reading range. 4. CONCLUSION In this paper, a directional, low-profile ZPSL loop antenna has been proposed for UHF near-field RFID applications. The current distributions on the proposed antenna have been analyzed to achieve the desired magnetic near-field distribution. The parasitic ZPSL loop element of the proposed design realizes an inphase current distribution as the driven element, and thus helps reduce the current cancellation caused by the out-of-phase current on the ground plane. Compared with a single ZPSL loop, the proposed ZPSL antenna has demonstrated a significantly improved performance as a UHF near-field RFID reader antenna. REFERENCES 1. Y. Zeng, Z. N. Chen, X. Qing, and J. M. Jin, Modeling and characterization of zero-phase-shift line (ZPSL) and optimization of electrically large ZPSL loop antennas for near-field systems, IEEE Trans. Antennas Progag., vol. 64, no. 11, pp , 2016.
7 2. Y. Yao, C. C, Y. J, and C. X, A meander line UHF RFID reader antenna for near-field applications, IEEE Trans. Antennas Progag.,vol. 65, no. 1, pp , X. Qing, C. K. Goh, and Z. N. Chen, A broadband UHF near-field RFID antenna, IEEE Trans. Antennas Progag., vol. 58, no. 12, pp , Y. Zeng, Z. N. Chen, X. Qing, and J. M. Jin, An artificial magnetic conductor backed electrically large zero-phase-shift line grid-loop nearfield antenna, IEEE Trans. Antennas Progag., vol. 65, no. 4, pp , Z. N. Chen, Y. Juan, X. Qing, and W. Che, Enhanced radiation from a horizontal dipole closely placed above a PEC ground plane using a parasitic strip, IEEE Trans. Antennas Progag., vol. 64, no. 11, pp , Y. Zeng, Z. N. Chen, X. Qing, and J. M. Jin, Design of a near-field nonperiodic zero-phase-shiftline (ZPSL) loop antenna with a full dispersion characterization, IEEE Trans. Antennas Progag., vol. 65, no. 5,pp , 2017.
Multiple-Arm Dipoles Reader Antenna for UHF RFID Near-Field Applications
Progress In Electromagnetics Research Letters, Vol. 74, 39 45, 218 Multiple-Arm Dipoles Reader Antenna for UHF RFID Near-Field Applications Kui Jin, Jingming Zheng *, Xiaoxiang He, Yang Yang, Jin Gao,
More informationAn MNG-TL Loop Antenna for UHF Near-Field RFID Applications
Progress In Electromagnetics Research Letters, Vol. 52, 79 85, 215 An MNG-TL Loop Antenna for UHF Near-Field RFID Applications Hu Liu *, Ying Liu, Ming Wei, and Shuxi Gong Abstract A loop antenna is designed
More informationResearch Article A Broadband Circularly Polarized Stacked Probe-Fed Patch Antenna for UHF RFID Applications
Antennas and Propagation Volume 7, Article ID 7793, pages doi:1.1155/7/7793 Research Article A Broadband Circularly Polarized Stacked Probe-Fed Patch Antenna for UHF RFID Applications Hang Leong Chung,
More informationBroadband and Gain Enhanced Bowtie Antenna with AMC Ground
Progress In Electromagnetics Research Letters, Vol. 61, 25 30, 2016 Broadband and Gain Enhanced Bowtie Antenna with AMC Ground Xue-Yan Song *, Chuang Yang, Tian-Ling Zhang, Ze-Hong Yan, and Rui-Na Lian
More informationNEAR-FIELD UHF RFID READER ANTENNA DESIGN
NEAR-FIELD UHF RFID READER ANTENNA DESIGN GOH CHEAN KHAN (B.Eng. (Hons) Electronics majoring in Telecommunications, Multimedia University, Malaysia) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING
More informationA Compact Wideband Slot Antenna for Universal UHF RFID Reader
Progress In Electromagnetics Research Letters, Vol. 7, 7, 8 A Compact Wideband Slot Antenna for Universal UHF RFID Reader Waleed Abdelrahim and Quanyuan Feng * Abstract A compact wideband circularly polarized
More informationCitation Electromagnetics, 2012, v. 32 n. 4, p
Title Low-profile microstrip antenna with bandwidth enhancement for radio frequency identification applications Author(s) Yang, P; He, S; Li, Y; Jiang, L Citation Electromagnetics, 2012, v. 32 n. 4, p.
More informationInternational Journal for Research in Applied Science & Engineering Technology (IJRASET) Circular Microstrip Patch Antenna for RFID Application
Circular Microstrip Patch Antenna for RFID Application Swapnali D. Hingmire 1, Mandar P. Joshi 2, D. D. Ahire 3 1,2,3 E&TC Department, 1 R. H. Sapat COE, Nashik, 2,3 Matoshri COE, Nashik, Savitri Bai Phule
More informationCHAPTER 5 PRINTED FLARED DIPOLE ANTENNA
CHAPTER 5 PRINTED FLARED DIPOLE ANTENNA 5.1 INTRODUCTION This chapter deals with the design of L-band printed dipole antenna (operating frequency of 1060 MHz). A study is carried out to obtain 40 % impedance
More informationDESIGN OF A NOVEL WIDEBAND LOOP ANTENNA WITH PARASITIC RESONATORS. Microwaves, Xidian University, Xi an, Shaanxi, China
Progress In Electromagnetics Research Letters, Vol. 37, 47 54, 2013 DESIGN OF A NOVEL WIDEBAND LOOP ANTENNA WITH PARASITIC RESONATORS Shoutao Fan 1, *, Shufeng Zheng 1, Yuanming Cai 1, Yingzeng Yin 1,
More informationENHANCEMENT OF PRINTED DIPOLE ANTENNAS CHARACTERISTICS USING SEMI-EBG GROUND PLANE
J. of Electromagn. Waves and Appl., Vol. 2, No. 8, 993 16, 26 ENHANCEMENT OF PRINTED DIPOLE ANTENNAS CHARACTERISTICS USING SEMI-EBG GROUND PLANE F. Yang, V. Demir, D. A. Elsherbeni, and A. Z. Elsherbeni
More informationCHAPTER 5 ANALYSIS OF MICROSTRIP PATCH ANTENNA USING STACKED CONFIGURATION
1 CHAPTER 5 ANALYSIS OF MICROSTRIP PATCH ANTENNA USING STACKED CONFIGURATION 5.1 INTRODUCTION Rectangular microstrip patch with U shaped slotted patch is stacked, Hexagonal shaped patch with meander patch
More informationR. Zhang, G. Fu, Z.-Y. Zhang, and Q.-X. Wang Key Laboratory of Antennas and Microwave Technology Xidian University, Xi an, Shaanxi , China
Progress In Electromagnetics Research Letters, Vol. 2, 137 145, 211 A WIDEBAND PLANAR DIPOLE ANTENNA WITH PARASITIC PATCHES R. Zhang, G. Fu, Z.-Y. Zhang, and Q.-X. Wang Key Laboratory of Antennas and Microwave
More informationAntennas Prof. Girish Kumar Department of Electrical Engineering Indian Institute of Technology, Bombay. Module 2 Lecture - 10 Dipole Antennas-III
Antennas Prof. Girish Kumar Department of Electrical Engineering Indian Institute of Technology, Bombay Module 2 Lecture - 10 Dipole Antennas-III Hello, and welcome to todays lecture on Dipole Antenna.
More informationPolitecnico di Torino. Porto Institutional Repository
Politecnico di Torino Porto Institutional Repository [Proceeding] Integrated miniaturized antennas for automotive applications Original Citation: Vietti G., Dassano G., Orefice M. (2010). Integrated miniaturized
More informationSMALL PROXIMITY COUPLED CERAMIC PATCH ANTENNA FOR UHF RFID TAG MOUNTABLE ON METALLIC OBJECTS
Progress In Electromagnetics Research C, Vol. 4, 129 138, 2008 SMALL PROXIMITY COUPLED CERAMIC PATCH ANTENNA FOR UHF RFID TAG MOUNTABLE ON METALLIC OBJECTS J.-S. Kim, W.-K. Choi, and G.-Y. Choi RFID/USN
More informationA Circularly Polarized Planar Antenna Modified for Passive UHF RFID
A Circularly Polarized Planar Antenna Modified for Passive UHF RFID Daniel D. Deavours Abstract The majority of RFID tags are linearly polarized dipole antennas but a few use a planar dual-dipole antenna
More informationBroadband Circular Polarized Antenna Loaded with AMC Structure
Progress In Electromagnetics Research Letters, Vol. 76, 113 119, 2018 Broadband Circular Polarized Antenna Loaded with AMC Structure Yi Ren, Xiaofei Guo *,andchaoyili Abstract In this paper, a novel broadband
More informationAntenna Theory and Design
Antenna Theory and Design Antenna Theory and Design Associate Professor: WANG Junjun 王珺珺 School of Electronic and Information Engineering, Beihang University F1025, New Main Building wangjunjun@buaa.edu.cn
More informationDUAL-BAND LOW PROFILE DIRECTIONAL ANTENNA WITH HIGH IMPEDANCE SURFACE REFLECTOR
Progress In Electromagnetics Research Letters, Vol. 25, 67 75, 211 DUAL-BAND LOW PROFILE DIRECTIONAL ANTENNA WITH HIGH IMPEDANCE SURFACE REFLECTOR X. Mu *, W. Jiang, S.-X. Gong, and F.-W. Wang Science
More informationFirst-Order Minkowski Fractal Circularly Polarized Slot Loop Antenna with Simple Feeding Network for UHF RFID Reader
Progress In Electromagnetics Research Letters, Vol. 77, 89 96, 218 First-Order Minkowski Fractal Circularly Polarized Slot Loop Antenna with Simple Feeding Network for UHF RFID Reader Xiuhui Yang 1, Quanyuan
More informationEYE-SHAPED SEGMENTED READER ANTENNA FOR NEAR-FIELD UHF RFID APPLICATIONS
Progress In Electromagnetics Research, Vol. 114, 481 493, 211 EYE-SHAPED SEGMENTED READER ANTENNA FOR NEAR-FIELD UHF RFID APPLICATIONS X. Li and J. Liao Key Laboratory of Universal Wireless Communications
More informationDesign of A New Universal Reader RFID Antenna Eye-Shaped in UHF Band
Design of A New Universal Reader RFID Antenna Eye-Shaped in UHF Band Mohamed Taouzari 1, Ahmed Mouhsen 1, Jamal El Aoufi 1, Jamal Zbitou 2, Otman El Marabat 3 1 Faculty of Science and Technical, University
More informationRFID Tag Antennas Mountable on Metallic Platforms
Southern Illinois University Carbondale OpenSIUC Books Department of Electrical and Computer Engineering 2-2010 RFID Tag Antennas Mountable on Metallic Platforms Byunggil Yu Kwangwoon University Frances
More informationDual-Band e-shaped Antenna for RFID Reader
Dual-Band e-shaped Antenna for RFID Reader Dual-Band e-shaped Antenna for RFID Reader M. Abu, E.E. Hussin, M. A. Amin and T.Z.M. Raus Faculty of Electronic and Computer Engineering Universiti Teknikal
More informationLarge Loop Antennas. Special thanks to graduate students of ECSE 593 class, Winter 2007: Yasha Khatamian, Lin Han, Ruiming Chen
Large Loop Antennas Special thanks to graduate students of ECSE 593 class, Winter 2007: Yasha Khatamian, Lin Han, Ruiming Chen McGill University, ECSE 405 Antennas, Fall 2009, Prof. M. Popovic 1. History
More informationEffects of Two Dimensional Electromagnetic Bandgap (EBG) Structures on the Performance of Microstrip Patch Antenna Arrays
Effects of Two Dimensional Electromagnetic Bandgap (EBG) Structures on the Performance of Microstrip Patch Antenna Arrays Mr. F. Benikhlef 1 and Mr. N. Boukli-Hacen 2 1 Research Scholar, telecommunication,
More informationA Wideband Dual-polarized Modified Bowtie Antenna for 2G/3G/LTE Base-station Applications
Progress In Electromagnetics Research Letters, Vol. 61, 131 137, 2016 A Wideband Dual-polarized Modified Bowtie Antenna for 2G/3G/LTE Base-station Applications Zhao Yang *, Cilei Zhang, Yingzeng Yin, and
More informationChapter 7 Design of the UWB Fractal Antenna
Chapter 7 Design of the UWB Fractal Antenna 7.1 Introduction F ractal antennas are recognized as a good option to obtain miniaturization and multiband characteristics. These characteristics are achieved
More informationA HIGH-POWER LOW-LOSS MULTIPORT RADIAL WAVEGUIDE POWER DIVIDER
Progress In Electromagnetics Research Letters, Vol. 31, 189 198, 2012 A HIGH-POWER LOW-LOSS MULTIPORT RADIAL WAVEGUIDE POWER DIVIDER X.-Q. Li *, Q.-X. Liu, and J.-Q. Zhang School of Physical Science and
More informationDUAL-WIDEBAND MONOPOLE LOADED WITH SPLIT RING FOR WLAN APPLICATION
Progress In Electromagnetics Research Letters, Vol. 21, 11 18, 2011 DUAL-WIDEBAND MONOPOLE LOADED WITH SPLIT RING FOR WLAN APPLICATION W.-J. Wu, Y.-Z. Yin, S.-L. Zuo, Z.-Y. Zhang, and W. Hu National Key
More informationA UHF RFID Antenna Using Double-Tuned Impedance Matching for Bandwidth Enhancement
Progress In Electromagnetics Research Letters, Vol. 70, 59 66, 2017 A UHF RFID Antenna Using Double-Tuned Impedance Matching for Bandwidth Enhancement Ziyang Wang *, Jinhai Liu, Hui Li, and Ying-Zeng Yin
More informationMiniature Multiband Antenna for WLAN and X-Band Satellite Communication Applications
Progress In Electromagnetics Research Letters, Vol. 75, 13 18, 2018 Miniature Multiband Antenna for WLAN and X-Band Satellite Communication Applications Ruixing Zhi, Mengqi Han, Jing Bai, Wenying Wu, and
More informationElectrically-Small Circularly-Polarized Quasi-Yagi Antenna
Progress In Electromagnetics Research Letters, Vol. 72, 75 81, 218 Electrically-Small Circularly-Polarized Quasi-Yagi Antenna Son Xuat Ta 1, 2, * Abstract In this letter, an electrically-small circularly
More informationResearch Article A Miniaturized Meandered Dipole UHF RFID Tag Antenna for Flexible Application
Antennas and Propagation Volume 216, Article ID 2951659, 7 pages http://dx.doi.org/1.1155/216/2951659 Research Article A Miniaturized Meandered Dipole UHF RFID Tag Antenna for Flexible Application Xiuwei
More informationLow-Profile Wideband Circularly Polarized Patch Antenna Using Asymmetric Feeding
Progress In Electromagnetics Research Letters, Vol. 48, 21 26, 2014 Low-Profile Wideband Circularly Polarized Patch Antenna Using Asymmetric Feeding Yang-Tao Wan *, Fu-Shun Zhang, Dan Yu, Wen-Feng Chen,
More informationResearch Article Gain Enhancement of Low-Profile, Electrically Small Capacitive Feed Antennas Using Stacked Meander Lines
Antennas and Propagation Volume 21, Article ID 66717, 8 pages doi:1.1155/21/66717 Research Article Gain Enhancement of Low-Profile, Electrically Small Capacitive Feed Antennas Using Stacked Meander Lines
More informationA Broadband Omnidirectional Antenna Array for Base Station
Progress In Electromagnetics Research C, Vol. 54, 95 101, 2014 A Broadband Omnidirectional Antenna Array for Base Station Bo Wang 1, *, Fushun Zhang 1,LiJiang 1, Qichang Li 2, and Jian Ren 1 Abstract A
More informationA Novel Planar Microstrip Antenna Design for UHF RFID
A Novel Planar Microstrip Antenna Design for UHF RFID Madhuri Eunni, Mutharasu Sivakumar, Daniel D.Deavours* Information and Telecommunications Technology Centre University of Kansas, Lawrence, KS 66045
More informationChapter 2 Estimation of Slot Position for a Slotted Antenna
Chapter 2 Estimation of Slot Position for a Slotted Antenna Arnab Das, Chayan Banerjee, Bipa Datta and Moumita Mukherjee Abstract Compact microstrip patch antennas have become quite popular nowadays. With
More informationMiniature Folded Printed Quadrifilar Helical Antenna with Integrated Compact Feeding Network
Progress In Electromagnetics Research Letters, Vol. 45, 13 18, 14 Miniature Folded Printed Quadrifilar Helical Antenna with Integrated Compact Feeding Network Ping Xu *, Zehong Yan, Xiaoqiang Yang, Tianling
More informationAN Far field antenna design. Document information. UCODE EPC G2, G2XM, G2XL, Antenna design
AN 0971 Far field antenna design Rev 1.4 4 March 2008 Application note Document information Info Keywords Abstract Content UCODE EPC G2, G2XM, G2XL, Antenna design This application note provides general
More informationRadiation Performance of an Elliptical Patch Antenna with Three Orthogonal Sector Slots
ROMANIAN JOURNAL OF INFORMATION SCIENCE AND TECHNOLOGY Volume 14, Number 2, 2011, 123 130 Radiation Performance of an Elliptical Patch Antenna with Three Orthogonal Sector Slots Vijay SHARMA 1, V. K. SAXENA
More informationA Compact Dual-Polarized Antenna for Base Station Application
Progress In Electromagnetics Research Letters, Vol. 59, 7 13, 2016 A Compact Dual-Polarized Antenna for Base Station Application Guan-Feng Cui 1, *, Shi-Gang Zhou 2,Shu-XiGong 1, and Ying Liu 1 Abstract
More informationCompact Microstrip UHF-RFID Tag Antenna on Metamaterial Loaded with Complementary Split-Ring Resonators
Compact Microstrip UHF-RFID Tag Antenna on Metamaterial Loaded with Complementary Split-Ring Resonators Joao P. S. Dias, Fernando J. S. Moreira and Glaucio L. Ramos GAPTEM, Department of Electronic Engineering,
More informationSeries Micro Strip Patch Antenna Array For Wireless Communication
Series Micro Strip Patch Antenna Array For Wireless Communication Ashish Kumar 1, Ridhi Gupta 2 1,2 Electronics & Communication Engg, Abstract- The concept of Microstrip Antenna Array with high efficiency
More informationAbstract In this paper, the design of a multiple U-slotted
A Dual Band Microstrip Patch Antenna for WLAN and WiMAX Applications P. Krachodnok International Science Index, Electronics and Communication Engineering waset.org/publication/9998666 Abstract In this
More informationA COMPACT CPW-FED MONOPOLE ANTENNA WITH A U-SHAPED STRIP AND A PAIR OF L-SLITS GROUND FOR WLAN AND WIMAX APPLICATIONS
Progress In Electromagnetics Research Letters, Vol. 16, 11 19, 21 A COMPACT CPW-FED MONOPOLE ANTENNA WITH A U-SHAPED STRIP AND A PAIR OF L-SLITS GROUND FOR WLAN AND WIMAX APPLICATIONS Z.-Y. Liu, Y.-Z.
More informationResonant Antennas: Wires and Patches
Resonant Antennas: Wires and Patches Dipole Antennas Antenna 48 Current distribution approximation Un-normalized pattern: and Antenna 49 Radiating power: For half-wave dipole and,, or at exact resonance.
More informationDesign of center-fed printed planar slot arrays
International Journal of Microwave and Wireless Technologies, page 1 of 9. # Cambridge University Press and the European Microwave Association, 2015 doi:10.1017/s1759078715001701 research paper Design
More informationFractal-Based Triangular Slot Antennas with Broadband Circular Polarization for RFID Readers
Progress In Electromagnetics Research C, Vol. 51, 121 129, 2014 Fractal-Based Triangular Slot Antennas with Broadband Circular Polarization for RFID Readers Jianjun Wu *, Xueshi Ren, Zhaoxing Li, and Yingzeng
More informationCouple-fed Circular Polarization Bow Tie Microstrip Antenna
PIERS ONLINE, VOL., NO., Couple-fed Circular Polarization Bow Tie Microstrip Antenna Huan-Cheng Lien, Yung-Cheng Lee, and Huei-Chiou Tsai Wu Feng Institute of Technology Chian-Ku Rd., Sec., Ming-Hsiung
More informationANALYSIS OF ELECTRICALLY SMALL SIZE CONICAL ANTENNAS. Y. K. Yu and J. Li Temasek Laboratories National University of Singapore Singapore
Progress In Electromagnetics Research Letters, Vol. 1, 85 92, 2008 ANALYSIS OF ELECTRICALLY SMALL SIZE CONICAL ANTENNAS Y. K. Yu and J. Li Temasek Laboratories National University of Singapore Singapore
More informationA COMPACT MULTIBAND MONOPOLE ANTENNA FOR WLAN/WIMAX APPLICATIONS
Progress In Electromagnetics Research Letters, Vol. 23, 147 155, 2011 A COMPACT MULTIBAND MONOPOLE ANTENNA FOR WLAN/WIMAX APPLICATIONS Z.-N. Song, Y. Ding, and K. Huang National Key Laboratory of Antennas
More informationSusceptibility of an Electromagnetic Band-gap Filter
1 Susceptibility of an Electromagnetic Band-gap Filter Shao Ying Huang, Student Member, IEEE and Yee Hui Lee, Member, IEEE, Abstract In a compact dual planar electromagnetic band-gap (EBG) microstrip structure,
More informationA Compact Dual Band-Notched Ultrawideband Antenna with λ/4 Stub and Open Slots
Progress In Electromagnetics Research C, Vol. 49, 133 139, 2014 A Compact Dual Band-Notched Ultrawideband Antenna with λ/4 Stub and Open Slots Jian Ren * and Yingzeng Yin Abstract A novel compact UWB antenna
More informationHigh gain W-shaped microstrip patch antenna
High gain W-shaped microstrip patch antenna M. N. Shakib 1a),M.TariqulIslam 2, and N. Misran 1 1 Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia (UKM), UKM
More informationLoop and Slot Antennas
Loop and Slot Antennas Prof. Girish Kumar Electrical Engineering Department, IIT Bombay gkumar@ee.iitb.ac.in (022) 2576 7436 Loop Antenna Loop antennas can have circular, rectangular, triangular or any
More informationDesign of Low-Index Metamaterial Lens Used for Wideband Circular Polarization Antenna
Progress In Electromagnetics Research Letters, Vol. 68, 93 98, 2017 Design of Low-Index Metamaterial Lens Used for Wideband Circular Polarization Antenna Yong Wang and Yanlin Zou * Abstract A novel low-index
More informationA Wideband Magneto-Electric Dipole Antenna with Improved Feeding Structure
ADVANCED ELECTROMAGNETICS, VOL. 5, NO. 2, AUGUST 2016 ` A Wideband Magneto-Electric Dipole Antenna with Improved Feeding Structure Neetu Marwah 1, Ganga P. Pandey 2, Vivekanand N. Tiwari 1, Sarabjot S.
More informationBroadband Dual Polarized Space-Fed Antenna Arrays with High Isolation
Progress In Electromagnetics Research C, Vol. 55, 105 113, 2014 Broadband Dual Polarized Space-Fed Antenna Arrays with High Isolation Prashant K. Mishra 1, *, Dhananjay R. Jahagirdar 1,andGirishKumar 2
More informationA VARACTOR-TUNABLE HIGH IMPEDANCE SURFACE FOR ACTIVE METAMATERIAL ABSORBER
Progress In Electromagnetics Research C, Vol. 43, 247 254, 2013 A VARACTOR-TUNABLE HIGH IMPEDANCE SURFACE FOR ACTIVE METAMATERIAL ABSORBER Bao-Qin Lin *, Shao-Hong Zhao, Qiu-Rong Zheng, Meng Zhu, Fan Li,
More informationTraveling Wave Antennas
Traveling Wave Antennas Antennas with open-ended wires where the current must go to zero (dipoles, monopoles, etc.) can be characterized as standing wave antennas or resonant antennas. The current on these
More informationAmerican International Journal of Research in Science, Technology, Engineering & Mathematics
American International Journal of Research in Science, Technology, Engineering & Mathematics Available online at http://www.iasir.net ISSN (Print): 2328-3491, ISSN (Online): 2328-3580, ISSN (CD-ROM): 2328-3629
More informationChapter 2. Modified Rectangular Patch Antenna with Truncated Corners. 2.1 Introduction of rectangular microstrip antenna
Chapter 2 Modified Rectangular Patch Antenna with Truncated Corners 2.1 Introduction of rectangular microstrip antenna 2.2 Design and analysis of rectangular microstrip patch antenna 2.3 Design of modified
More informationMeasurement Setups for Millimeter-Wave Antennas at 60/140/270 GHz Bands
Measurement Setups for Millimeter-Wave Antennas at 60/140/270 GHz Bands Xianming QING *1 Zhi Ning CHEN *1,2 1 Institute for Infocomm Research (I 2 R), Singapore 2 National University of Singapore (NUS)
More informationStacked Configuration of Rectangular and Hexagonal Patches with Shorting Pin for Circularly Polarized Wideband Performance
Cent. Eur. J. Eng. 4(1) 2014 20-26 DOI: 10.2478/s13531-013-0136-3 Central European Journal of Engineering Stacked Configuration of Rectangular and Hexagonal Patches with Shorting Pin for Circularly Polarized
More informationYou will need the following pieces of equipment to complete this experiment: Wilkinson power divider (3-port board with oval-shaped trace on it)
UNIVERSITY OF TORONTO FACULTY OF APPLIED SCIENCE AND ENGINEERING The Edward S. Rogers Sr. Department of Electrical and Computer Engineering ECE422H1S: RADIO AND MICROWAVE WIRELESS SYSTEMS EXPERIMENT 1:
More informationCOMPACT SLOT ANTENNA WITH EBG FEEDING LINE FOR WLAN APPLICATIONS
Progress In Electromagnetics Research C, Vol. 10, 87 99, 2009 COMPACT SLOT ANTENNA WITH EBG FEEDING LINE FOR WLAN APPLICATIONS A. Danideh Department of Electrical Engineering Islamic Azad University (IAU),
More informationDesign of Substrate-Integrated Waveguide Slot Antenna with AZIM Coating
Design of Substrate-Integrated Waveguide Slot Antenna with Coating Pomal Dhara Anantray 1, Prof. Satish Ramdasji Bhoyar 2 1 Student, Electronics and Telecommunication, Rajiv Gandhi Institute of Technology,
More informationAn improved UWB Patch Antenna Design using Multiple Notches and Finite Ground Plane
73 An improved UWB Patch Antenna Design using Multiple Notches and Finite Ground Plane A.P Padmavathy, M.Ganesh Madhan, Department of Electronics Engineering, Madras Institute of Technology, Anna University,
More informationCOMPACT LOOP ANTENNA FOR NEAR-FIELD AND FAR-FIELD UHF RFID APPLICATIONS
Progress In Electromagnetics Research C, Vol. 37, 171 182, 2013 COMPACT LOOP ANTENNA FOR NEAR-FIELD AND FAR-FIELD UHF RFID APPLICATIONS Xiaozheng Lai 1, *, Zeming Xie 2, and Xuanliang Cen 2 1 School of
More informationCoupled Sectorial Loop Antenna (CSLA) for Ultra Wideband Applications
Coupled Sectorial Loop Antenna (CSLA) for Ultra Wideband Applications N. Behdad and K. Sarabandi Presented by Nader Behdad at Antenna Application Symposium, Monticello, IL, Sep 2004 Email: behdad@ieee.org
More informationDesign and Application of Triple-Band Planar Dipole Antennas
Journal of Information Hiding and Multimedia Signal Processing c 2015 ISSN 2073-4212 Ubiquitous International Volume 6, Number 4, July 2015 Design and Application of Triple-Band Planar Dipole Antennas
More informationA CPW-fed Microstrip Fork-shaped Antenna with Dual-band Circular Polarization
Machine Copy for Proofreading, Vol. x, y z, 2016 A CPW-fed Microstrip Fork-shaped Antenna with Dual-band Circular Polarization Chien-Jen Wang and Yu-Wei Cheng * Abstract This paper presents a microstrip
More informationDual-Band UHF RFID Tag Antenna Using Two Eccentric Circular Rings
Progress In Electromagnetics Research M, Vol. 71, 127 136, 2018 Dual-Band UHF RFID Tag Antenna Using Two Eccentric Circular Rings Bidisha Barman, Sudhir Bhaskar *, and Amit Kumar Singh Abstract A low profile
More informationBroadband aperture-coupled equilateral triangular microstrip array antenna
Indian Journal of Radio & Space Physics Vol. 38, June 2009, pp. 174-179 Broadband aperture-coupled equilateral triangular microstrip array antenna S N Mulgi $,*, G M Pushpanjali, R B Konda, S K Satnoor
More informationThe Basics of Patch Antennas, Updated
The Basics of Patch Antennas, Updated By D. Orban and G.J.K. Moernaut, Orban Microwave Products www.orbanmicrowave.com Introduction This article introduces the basic concepts of patch antennas. We use
More information3. LITERATURE REVIEW. 3.1 The Planar Inverted-F Antenna.
3. LITERATURE REVIEW The commercial need for low cost and low profile antennas for mobile phones has drawn the interest of many researchers. While wire antennas, like the small helix and quarter-wavelength
More informationGAIN COMPARISON MEASUREMENTS IN SPHERICAL NEAR-FIELD SCANNING
GAIN COMPARISON MEASUREMENTS IN SPHERICAL NEAR-FIELD SCANNING ABSTRACT by Doren W. Hess and John R. Jones Scientific-Atlanta, Inc. A set of near-field measurements has been performed by combining the methods
More informationAntennas and Propagation. Chapter 4: Antenna Types
Antennas and Propagation : Antenna Types 4.4 Aperture Antennas High microwave frequencies Thin wires and dielectrics cause loss Coaxial lines: may have 10dB per meter Waveguides often used instead Aperture
More informationCHAPTER 8 ANTENNAS 1
CHAPTER 8 ANTENNAS 1 2 Antennas A good antenna works A bad antenna is a waste of time & money Antenna systems can be very inexpensive and simple They can also be very expensive 3 Antenna Considerations
More informationCompact and Low Profile MIMO Antenna for Dual-WLAN-Band Access Points
Progress In Electromagnetics Research Letters, Vol. 67, 97 102, 2017 Compact and Low Profile MIMO Antenna for Dual-WLAN-Band Access Points Xinyao Luo *, Jiade Yuan, and Kan Chen Abstract A compact directional
More informationTECHNICAL REPORT: CVEL Special Considerations for PCB Heatsink Radiation Estimation. Xinbo He and Dr. Todd Hubing Clemson University
TECHNICAL REPORT: CVEL-11-27 Special Considerations for PCB Heatsink Radiation Estimation Xinbo He and Dr. Todd Hubing Clemson University May 4, 211 Table of Contents Abstract... 3 1. Configuration for
More informationA Triangular Patch Antenna for UHF Band With Microstrip Feed Line for RFID Applications Twinkle Kundu 1 and Davinder Parkash 2
A Triangular Patch Antenna for UHF Band With Microstrip Feed Line for RFID Applications Twinkle Kundu 1 and Davinder Parkash 1 M.Tech. Student, Assoc. Prof, ECE Deptt. Haryana College of Technology & Management,
More informationDESIGN OF 0.92 GHZ ARTIFICIAL MAGNETIC CONDUCTOR FOR METAL OBJECT DETECTION IN RFID TAG APPLICATION WITH LITTLE SENSITIVITY TO INCIDENCE OF ANGLE
2 th February 214. Vol. 6 No.2 25-214 JATIT & LLS. All rights reserved. DESIGN OF.92 GHZ ARTIFICIAL MAGNETIC CONDUCTOR FOR METAL OBJECT DETECTION IN RFID TAG APPLICATION WITH LITTLE SENSITIVITY TO INCIDENCE
More informationMonopole Antennas. Prof. Girish Kumar Electrical Engineering Department, IIT Bombay. (022)
Monopole Antennas Prof. Girish Kumar Electrical Engineering Department, IIT Bombay gkumar@ee.iitb.ac.in (022) 2576 7436 Monopole Antenna on Infinite Ground Plane Quarter-wavelength monopole Antenna on
More informationDESIGN OF PRINTED YAGI ANTENNA WITH ADDI- TIONAL DRIVEN ELEMENT FOR WLAN APPLICA- TIONS
Progress In Electromagnetics Research C, Vol. 37, 67 81, 013 DESIGN OF PRINTED YAGI ANTENNA WITH ADDI- TIONAL DRIVEN ELEMENT FOR WLAN APPLICA- TIONS Jafar R. Mohammed * Communication Engineering Department,
More informationDesign of an UHF RFID Antenna on Flexible Substrate Magnetically Coupled to the Tag
Design of an UHF RFID Antenna on Flexible Substrate Magnetically Coupled to the Tag Marco Virili 1, Paolo Mezzanotte 1, Hendrik Rogier 2, Federico Alimenti 1, and Luca Roselli 1 1 Department of Electronic
More informationA Thin Folded Dipole UHF RFID Tag Antenna with Shorting Pins for Metallic Objects
KSII TRANSACTIONS ON INTERNET AND INFORMATION SYSTEMS VOL. 6, NO. 9, Sep 212 2253 Copyright 212 KSII A Thin Folded Dipole UHF RFID Tag Antenna with Shorting Pins for Metallic Objects Tao Tang and Guo-hong
More informationDetermination of the Generalized Scattering Matrix of an Antenna From Characteristic Modes
4848 IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 61, NO. 9, SEPTEMBER 2013 Determination of the Generalized Scattering Matrix of an Antenna From Characteristic Modes Yoon Goo Kim and Sangwook Nam
More informationCircularly Polarized Square Patch Microstrip Antenna with Y- Shaped Slot for Wi-Max Application
Available online www.ejaet.com European Journal of Advances in Engineering and Technology, 2014, 1(1): 61-68 Research Article Circularly Polarized Square Patch Microstrip Antenna with Y- Shaped Slot for
More informationA NOVEL DESIGN OF LTE SMART MOBILE ANTENNA WITH MULTIBAND OPERATION
Progress In Electromagnetics Research C, Vol. 42, 19 124, 213 A NOVEL DESIGN OF LTE SMART MOBILE ANTENNA WITH MULTIBAND OPERATION Sheng-Ming Deng 1, *, Ching-Long Tsai 1, Jiun-Peng Gu 2, Kwong-Kau Tiong
More informationA Wide-Beam Circularly Polarized Asymmetric-Microstrip Antenna
> 1 A Wide-Beam Circularly Polarized Asymmetric-Microstrip Antenna Abstract A wide-beam circularly polarized (CP) asymmetricmicrostrip antenna with four unequal circular-patches is proposed for global
More informationPower Margin Reduction in Linear passive UHF RFID tag arrays
Power Margin Reduction in Linear passive UHF RFID tag arrays Qi Zhang, Michael Crisp, Ian H. White and Richard V.Penty Centre for Photonic Systems, Electrical Division, Department of Engineering, University
More informationResearch Article Tunable Compact UHF RFID Metal Tag Based on CPWOpenStubFeedPIFAAntenna
Antennas and Propagation Volume 212, Article ID 167658, 8 pages doi:1.1155/212/167658 Research Article Tunable Compact UHF RFID Metal Tag Based on CPWOpenStubFeedPIFAAntenna Lingfei Mo and Chunfang Qin
More informationPlanar Radiators 1.1 INTRODUCTION
1 Planar Radiators 1.1 INTRODUCTION The rapid development of wireless communication systems is bringing about a wave of new wireless devices and systems to meet the demands of multimedia applications.
More informationA Compact Wideband Circularly Polarized L-Slot Antenna Edge-Fed by a Microstrip Feedline for C-Band Applications
Progress In Electromagnetics Research Letters, Vol. 65, 95 102, 2017 A Compact Wideband Circularly Polarized L-Slot Antenna Edge-Fed by a Microstrip Feedline for C-Band Applications Mubarak S. Ellis, Jerry
More informationA COMPACT DUAL INVERTED C-SHAPED SLOTS ANTENNA FOR WLAN APPLICATIONS
Progress In Electromagnetics Research Letters, Vol. 17, 115 123, 2010 A COMPACT DUAL INVERTED C-SHAPED SLOTS ANTENNA FOR WLAN APPLICATIONS D. Xi, L. H. Wen, Y. Z. Yin, Z. Zhang, and Y. N. Mo National Laboratory
More informationBroadband low cross-polarization patch antenna
RADIO SCIENCE, VOL. 42,, doi:10.1029/2006rs003595, 2007 Broadband low cross-polarization patch antenna Yong-Xin Guo, 1 Kah-Wee Khoo, 1 Ling Chuen Ong, 1 and Kwai-Man Luk 2 Received 27 November 2006; revised
More information